Top-3 iOS-only apps?

Although I also use other platforms, these 3 apps currently keep my iPhone as my main squeeze:

1. P90X: I use this to track my daily workouts from my favorite exercise program and it helps me progress in my strength conditioning.

2. Jeffrey Gitomer's Pocket Reference: a must-have for all sales professionals! Gitomer gives a free copy of his best-seller "The Little Red Book of Selling." This helps me with my daily sales motivation and creativity.

3. Burton: Although I haven't used this yet, I will love being able to track all my days on the mountain and to write journals about each trip. It will also help me track my goal for the number of days I plan to go snowboarding this winter season.

With exclusive apps such as these, I can see why many people don't leave iOS.